Oh yes, I’ve been to a couple of silent movie concerts also (THE GENERAL and NOSFERATU), and they’ve been great. Of course, when the music is the only sound, then the experience is turned into something quite different.
Both of these were rather small-scale events, with only two or three musicians – keyboards, percussion and (for NOSFERATU) a violinist. And both had original and quite inventive scores composed (and partly improvised) by the keyboard player, Kjetil Schjander Luhr (maybe you’ve heard of him, Thor? I think he’s done similar events at Cinemateket in Oslo).